Type training · Airbus A320 family B1.1 · ATA 49
Airbus A320 B1.1: Honeywell 131-9A APU (ATA 49)Type training questions & answers
APU installation and drains, fuel and oil systems, start and shutdown logic, ECB protections.
- A worked explanation on every question
- Written for the A318–A321 with IAE V2500-A5 engines
- Read in English or 15 other languages
Sample Honeywell 131-9A APU questions with answers
Three questions from the free preview. Think of your answer first, then open the explanation.
1.What kind of engine is the A320 APU?
- A.A two-spool turbofan
- B.A constant-speed gas turbine
- C.A variable-speed turboprop
Show answer and explanation
Correct answer: B. A constant-speed gas turbine
The APU is a constant-speed gas turbine in the tail cone driving a gearbox and a load compressor.
2.Where is the A320 APU installed?
- A.In the aft cargo compartment, right wall
- B.In the left main gear bay, forward
- C.In a fireproof tail-cone compartment
Show answer and explanation
Correct answer: C. In a fireproof tail-cone compartment
It sits in a fireproof compartment in the unpressurized tail cone, reached through two lower access doors.
3.Which A320 APU function is available throughout the flight envelope?
- A.Bleed air for wing anti-ice in flight
- B.Electrical power, whenever the APU runs
- C.Bleed air for engine start on ground
Show answer and explanation
Correct answer: B. Electrical power, whenever the APU runs
Electrical power is available whenever the APU runs. Bleed air is shut off above the manufacturer's limit.
Part of the Airbus A320 family B1.1 type course
One chapter of the Airbus A320 family B1.1 type course question bank, for the A318–A321 with IAE V2500-A5 engines, written in our own words for revision. Your type course and the aircraft maintenance manual stay the authority: limits and procedures can differ between airframes and operators.
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